Jim's expression does an impressive switch, from that objective listening to what the fuck are you serious? His brow creases and he squeezes his eyes shut for a moment before glancing away.

"An accident," Jim says, but even he can understand why this mistake was catastrophic. It would be like introducing a surplus of lions to an area where antelope didn't reproduce fast enough. Eventually, the antelope would die, and the predators would starve.

Nobody said that when humanity screwed up, they didn't do it radically. He exhales. "And that's when the war started."